Strip escape characters when TERM=dumb

Bug: 111447427
Test: m nothing
Test: TERM=dumb m nothing
Test: m nothing | tee log
Change-Id: I041ec8a60e633393a145996d9ba7b5dae2880b06

ui/terminal/writer.go

@@ -82,8 +82,8 @@ func NewWriter(stdio StdioInterface) Writer {
 
 	if term, ok := os.LookupEnv("TERM"); ok && term != "dumb" {
 		w.smartTerminal = isTerminal(stdio.Stdout())
-		w.stripEscapes = !w.smartTerminal
 	}
+	w.stripEscapes = !w.smartTerminal
 
 	return w
 }